works fine on Chrome (and I think on Firefox too) for showing all the full domain names that might otherwise be confusing here. I read that some users are reading HN mostly on mobile devices that don't allow mousing over the submission titles for the full URL, but that is also an option for any user who is reading HN at a desktop computer.
https://github.com/nex3/arc/blob/master/news.arc
will show what the trade-offs are for how Hacker News is currently designed. Meanwhile, the Show Full Domain on Hacker News posts user script
http://userscripts.org/scripts/show/121512
works fine on Chrome (and I think on Firefox too) for showing all the full domain names that might otherwise be confusing here. I read that some users are reading HN mostly on mobile devices that don't allow mousing over the submission titles for the full URL, but that is also an option for any user who is reading HN at a desktop computer.